If we square both sides of the equation -4 = 0, we get (-4)² = 0², which simplifies to 16 = 0. This equation is not true for any value of t, so we cannot determine the value of t based on this information. Squaring both sides of an equation can sometimes lead to extraneous solutions, which are solutions that do not satisfy the original equation. In this case, the equation -4 = 0 does not have any solutions, so squaring both sides of the equation to get 16 = 0 does not give us any useful information. Therefore, we cannot determine the value of t based on the information given in the question. Answer: \boxed{undetermined}.